package com.sky.controller.user;

import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController(value = "userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "用户端菜品接口")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    private static final String dish_="DISH_";

    /**
     * 根据类目id获取起售状态的菜品及对应口味
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据类目id获取对应菜品")
    public Result<List<DishVO>> listDishes(Long categoryId){
        log.info("用户端根据类目id获取菜品，CategoryId={}",categoryId);
        //查询redis中是否存在缓存
        String key=dish_+categoryId;
        List<DishVO> value=(List<DishVO>) redisTemplate.opsForValue().get(key);
        if(value!=null&&!value.isEmpty()){
            //存在缓存
            return Result.success(value);
        }
        //缓存不存在查询数据库，并更新缓存
        List<DishVO> list=dishService.listDishVOOnSale(categoryId);
        redisTemplate.opsForValue().set(key,list);
        return Result.success(list);
    }
}
